Valve mechanism



G. KAR'ST.

VALVE MECHANISM.

APPLICATION FIL'ED AUG-Q. 1916.

Patented Aug. 31, 1920.

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UNITED STATES PATENT. OF C -5' GEORGE KABST, OF ROCHESTER, NEW YORK, ASSIGNORTO TAYLOR INSTRUMENT COMPANIES, OF ROCHESTER, NEW YORK, A CORPORATION NEW YORK.

VALVE MECHANISM.

Specification of Letters Patent.

Patented A110. 31, 1920.

Application filed August 9, 1916.. Serial .No. 113,897.

To all whom it may concern: Be it known that I, GEORGE KARST, of Rochester, in the county of Monroe and ,State of New York, have invented certain new and useful Improvements in Valve Mechanisms; and I do hereby declare the following to be a full, clear, and exact deence-numerals marked thereon.

The object of the invention is to afford an'improved and novel valve mechanism of or other controlling condition.

plication of my invention;

the general, character employed in the operation of vulcanizers, retorts andthe like, where it is desirable to control the admission of a heating fluid automatically through a condition within the chamber to which the supply of heating fluid is furnished, and the chief purpose is to afford a simple arrangement for carrying out the purposes aforementioned. A further object of the invention is to afford such an arrangement as to obtain a sensitive, delicate, and proper response to the varying conditions under which the'main valve is controlled. Still an additional purpose of my improvement resides in the provision of efficient means for permitting adjustment of the controlling mechanism, so that the extent or time of opening of the main valve. may be varied with reference to the temperature, pressure, To these and other ends the invention consists in certain improvements and combinations of parts all as will be hereinafter more fully described, the novel features-being pointed out in the claims at the end of the specification.

In the drawings: Figure 1 is a front elevation of an apparatus partially in section, showing the ap- Fig. 2 is avertical sectional view taken centrally of the structure shown in Fig. 1, and looking in the same direction.

Fig. 3 is a sectional View on line 3 -3 of Fig. 2, and

Fig. 4 is a front view of the housing or casing containing the adjustable feature of the apparatus.

Similar reference numerals in the several figures indicate the same parts. 1

The present embodiment illustrates the invention as; applied to a retom or vuloanizeror analogous chamber to be heated by fluid, such as steam, the heating fluid being controlled by the temperature within the chamber through the instrumentality of a fluid pressure line that actuates the main valve in opening or closing. The fluid pressure for operating the main valve is sup;

plied or cut offby a mechanism that is directly aflected by the condition within the chamber, which in the present instance happens to be temperature. This controlmay be, under some conditions, otherwise affected, as by pressure for instance, although this will in no way materially affect or modify the essential features of my improvement.

With this general understanding of the mechanism, the structure comprises a retort, or vulcanizer or chamber 1, to which steam or other'heating fluid issupplied through a pipe 2 and is controlled by a main valve,

designated generally by 3. The main valve 3 is operated through a diaphragm arranged in a diaphragm chamber 4, the movement of which is determined by fluid pressure entering the chamber 4 from the pipe 5. Pressure preferably from an independent source is supplied to the pipe 5 from an inlet valve 6 through suitable ports in a valve housing 7 The latter contains a valve 8 that engages a valve seat when closed,,thereby cutting off fluid pressure to the main valve operating diaphragm. The valve 8 is normally held closed by a spring 9, and is mounted on a valve stem 10, carrying a head or projection 11 at its lower end for a purpose that will presently appear. When the valve 8 is opened, fluid pressure is admitted to the diaphragm chamber 4, thereby effecting closing movement of the main valve, and this takes place upon an increase of temperature within the retort 1, as will now appear. 12 designates a temperature afl'ected element or bulb I arranged in the retort land connected with a tube 13, containing any suitable heat expansive fluid, and leading to a capsular diaphragm 14 which is expanded and contracted in accordance with the heat condition within the retort. The central portion of the diaphragm 14 is substantially in alinement with the valve stem 10, and carries the projection 15. Arranged between the latter and the valve stem 10 is a connecting member, preferably in the form of an arm 16 pivotally mounted on a stationary bracket 17. The arm 16 carries a fixed portion 18 which engages the head 11 at the lower end of the'valve stem 10, and an adjustable portion for engagement with the projection 15 on the diaphragm 14. The last mentioned adjustable portion is preferably in the form of a rotatively adjustable cam 19, which is fixed upon a shaft 20 carrying a squared head 21, projecting partially through an opening22 in the glass face 23 of the housing or covering 24. The shaft 20 also carries a hand or indicator 25 cooperating with higher or lower to suit the requirements, and

by locating the cam 19, portion 18 and valve stem 10 in alinement with the central portion of the capsular diaphragm that governs their operation, I obtain an extremely delicate and sensitive mechanism that is especially eflicient in an apparatus of this sort where a very slight change in the controlling condition within the heated chamber is desired to'eifect a proper and corresponding change in the supply of the heating fluid.

The invention is also advantageous from the standpoint of simplicity, both as to number of parts and arrangement, thus insuring accuracy of control and durability of the mechanism as a whole.

I claim as my invention:

1. In a valve mechanism, the combination with a main valve, of a fluid pressure supply controlling the main valve, a pipe for said fluid pressure, a secondary valve governing the fluid pressure within said pipe provided with a valve stem, an operating diaphragm for the secondary valve having its central tween said diaphragm and valve stem compris ng a plvotally mounted arm having thereon a fixed part and an adjustable part, one of said parts engaging said valve stem and the other said diaphragm.

2. In a valve mechanism, the combination with a main valve, of a fluid pressure supply controlling the main valve, a pipe for said fluid pressure, a secondary valve governing the fluid pressure within said pipe, a valve stem on which the secondary valve is mounted, an operating diaphragm for the secondary'valve having its central portion in alinement with the valve stem, an operative connection arranged between the diaphragm and said valve stem and including a pivotally mounted arm, a fixed part on the arm engaging said valve stem, and an adjustable member on the arm engaging the diaphragm.

3. In a valve mechanism, the combination with a main valve, of a fluid pressure supply controlling the main valve, a' pipe for said fluid pressure, a secondary valve governing the fluid pressure within said pipe, a valve stem on which the secondary valve is mounted, an operating diaphragm for the-secondary valve having its central portion in alinement with the valve stem, an operative connection arranged between the diaphragm and said valve stem and including a pivotally mounted arm, a fixed part on the arm engaging said valve stem, and a rotatively adjustablecam on the arm having its edge engaged with the diaphragm.

. GEORGE KARST. Witnesses:

FRED K. TAYLOR, HERBERT J. NOBLE. 

